Semi-Experienced or "SE" is a label given to players who have completed four games on mafiascum.net and are signed up for a Newbie Game. Only the Newbie Queue uses this designation, as Semi-Experienced players are included in those games to ensure that the site's standard of play is represented in new players' first games. In 2013 the requirement for SE status was raised from two games to three, with at least one game taking place outside the Newbie Queue.
Despite occasional appearances, there is no official authority in the SE position. Since they have been on the site for a while, they can aid players who are new to the site like an IC would, but unlike ICs they are under no obligation to do so. They are simply non-Newbies who are playing a Newbie game.